TY - JOUR

T1 - Spiral plane flops in frustrated helimagnets in external magnetic field

AU - Utesov, O.

AU - Syromyatnikov, A.

PY - 2018/11/6

Y1 - 2018/11/6

N2 - We discuss theoretically frustrated Heisenberg spiral magnets in magnetic field H. We demonstrate that small anisotropic spin interactions (single-ion biaxial anisotropy or dipolar forces) select the plane in which spins rotate (spiral plane) and can lead to the spiral plane flop upon in-plane field increasing. Expressions for the critical fields H-fl(op) are derived. It is shown that measuring of H-flop, is an efficient and simple method of quantifying the anisotropy in the system (as the measurement of spin-flop fields in collinear magnets with axial anisotropy). Corresponding recent experiments are considered in spiral magnets some of which are multiferroics of spin origin.

AB - We discuss theoretically frustrated Heisenberg spiral magnets in magnetic field H. We demonstrate that small anisotropic spin interactions (single-ion biaxial anisotropy or dipolar forces) select the plane in which spins rotate (spiral plane) and can lead to the spiral plane flop upon in-plane field increasing. Expressions for the critical fields H-fl(op) are derived. It is shown that measuring of H-flop, is an efficient and simple method of quantifying the anisotropy in the system (as the measurement of spin-flop fields in collinear magnets with axial anisotropy). Corresponding recent experiments are considered in spiral magnets some of which are multiferroics of spin origin.

KW - FERROELECTRICITY

KW - MULTIFERROICS

U2 - 10.1103/PhysRevB.98.184406

DO - 10.1103/PhysRevB.98.184406

M3 - статья

VL - 98

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 18

M1 - 184406

ER -